Treadmill



FIG. 1 is an upper rear perspective view of the treadmill showing my design.

FIG. 2 is a back elevation view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is side elevation view thereof;

FIG. 5 is an opposite side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

Broken line portions indicate environment, such as decals, and form no part of the claimed design. 

CLAIM The ornamental design for a treadmill, as shown and described. 